Dualsenses Scalp Specialist, Densifying Shampoo 250ml The Goldwell Dualsenses Scalp Specialist Anti Hair Loss Serum prevents hair-loss and increases your hair density by making it look and feel thicker. This shampoo also gives the hair a healthier and fresher appearance. Dualsenses Scalp Specialist, Anti-Hair Loss Serum 150ml The Goldwell Dual Senses Scalp Specialist Anti Hair Loss Serum helps to prevent hair-loss, increases your hair density by making it look and feel thicker, strengthens the hair follicle, and stimulates roots and supports natural hair growth. Hair appears healthier and fresher.